name: Run post release processes
on:
    release:
        types: [released]

env:
    GIT_COMMITTER_NAME: 'WooCommerce Bot'
    GIT_COMMITTER_EMAIL: 'no-reply@woocommerce.com'
    GIT_AUTHOR_NAME: 'WooCommerce Bot'
    GIT_AUTHOR_EMAIL: 'no-reply@woocommerce.com'

permissions: {}

jobs:
    changelog-version-update:
        name: Update changelog and version
        runs-on: ubuntu-20.04
        permissions:
          contents: write
          pull-requests: write
        steps:
            - uses: actions/checkout@v3

            - name: Git fetch trunk branch
              run: git fetch origin trunk

            - name: Copy readme.txt to vm root
              run: cp ./plugins/woocommerce/readme.txt ../../readme.txt

            - name: Switch to trunk branch
              run: git checkout trunk

            - name: Create a new branch based on trunk
              run: git checkout -b prep/post-release-tasks-${{ github.event.release.tag_name }}

            - name: Check if we need to continue processing
              uses: actions/github-script@v6
              id: check
              with:
                  script: |
                      const fs = require( 'node:fs' );
                      const version = ${{ toJSON( github.event.release.tag_name ) }}

                      fs.readFile( './plugins/woocommerce/readme.txt', 'utf-8', function( err, data ) {
                        if ( err ) {
                          console.error( err );
                        }

                        const regex = /Stable\stag:\s(\d+\.\d+\.\d+)/;

                        const stableVersion = data.match( regex )[1];

                        // If the release version is less than stable version we can bail.
                        if ( version.localeCompare( stableVersion, undefined, { numeric: true, sensitivity: 'base' } ) == -1 ) {
                          console.log( 'Release version is less than stable version. No automated action taken. A manual process is required.' );
                          core.setOutput( 'continue', 'false' )
                          return;
                        } else {
                          core.setOutput( 'continue', 'true' )
                        }
                      } )

            - name: Update changelog.txt entries
              uses: actions/github-script@v6
              id: update-entries
              if: steps.check.outputs.continue == 'true'
              with:
                  script: |
                      const fs = require( 'node:fs' );
                      const version = ${{ toJSON( github.event.release.tag_name ) }}

                      // Read the saved readme.txt file from earlier.
                      fs.readFile( '../../readme.txt', 'utf-8', function( err, readme ) {
                        if ( err ) {
                          core.setOutput( 'continue', 'false' );
                          console.error( err );
                        }

                        const regex = /(== Changelog ==[\s\S]+)\s{2}\[See changelog for all versions\]\(https:\/\/raw\.githubusercontent\.com\/woocommerce\/woocommerce\/trunk\/changelog\.txt\)\./;

                        const entries = readme.match( regex )[1];

                        fs.readFile( './changelog.txt', 'utf-8', function( err, changelog ) {
                          if ( err ) {
                            core.setOutput( 'continue', 'false' );
                            console.error( err );
                          }

                          const regex = /== Changelog ==/;

                          const updatedChangelog = changelog.replace( regex, entries );

                          fs.writeFile( './changelog.txt', updatedChangelog, err => {
                            if ( err ) {
                              core.setOutput( 'continue', 'false' );
                              console.error( 'Unable to update changelog entries in changelog.txt' );
                            }

                            core.setOutput( 'continue', 'true' );
                          } )
                        } )
                      } )

            - name: Commit changes
              if: steps.update-entries.outputs.continue == 'true'
              run: git commit -am "Prep trunk post release ${{ github.event.release.tag_name }}"

            - name: Push branch up
              if: steps.update-entries.outputs.continue == 'true'
              run: git push origin prep/post-release-tasks-${{ github.event.release.tag_name }}

            - name: Create the PR
              if: steps.update-entries.outputs.continue == 'true'
              uses: actions/github-script@v6
              with:
                  script: |
                      const body = "This PR updates the changelog.txt entries based on the latest release: ${{ github.event.release.tag_name }}"

                      const pr = await github.rest.pulls.create({
                        owner: context.repo.owner,
                        repo: context.repo.repo,
                        title: "Update changelog.txt from release ${{ github.event.release.tag_name }}",
                        head: "prep/post-release-tasks-${{ github.event.release.tag_name }}",
                        base: "trunk",
                        body: body
                      })

                      const prCreated = await github.rest.pulls.requestReviewers({
                        owner: context.repo.owner,
                        repo: context.repo.repo,
                        pull_number: pr.data.number,
                        reviewers: ["${{ github.event.release.author.login }}"]
                      })